Oct. 19 - U.S. stocks had their worst day in more than two months after a warning from Caterpillar sent investors fleeing for the exits.

This year's third largest one-day plunge for the Dow eerily occurred on the 20-year anniversary of the October 1987 stock market crash, known as, Black Monday.

Conway G. Gittens reports. SPEAKER: Alec Young, strategist, Standard & Poor's. Conway G. Gittens reports from New York.